Orientation Growth and Magnetic Properties of Electrochemical Deposited Nickel Nanowire Arrays

Yanlong Yu,Xige Wu,Tao Xu,Jun Wang,Jinpeng Li,Hamidreza Arandiyan,Hongyu Sun,Cuiyan Yu,Bingdong Chang

doi:10.3390/catal9020152

Abstract

Highly ordered ferromagnetic metal nanowire arrays with preferred growth direction show potential applications in electronic and spintronic devices. In this work, by employing a porous anodic aluminum oxide template-assisted electrodeposition method, we successfully prepared Ni nanowire arrays. Importantly, the growth direction of Ni nanowire arrays can be controlled by varying the current densities. The crystalline and growth orientation of Ni nanowire arrays show effects on magnetic properties. Single-crystallinity Ni nanowires with [110] orientation show the best magnetic properties, including coercivity and squareness, along the parallel direction of the nanowire axis. The current preparation strategy can be used to obtain other nanowire arrays (such as metal, alloy, and semiconductor) with controlled growth direction in confined space, and is therefore of broad interest for different applications.

Highlights

With the rapid development of spintronics, information storage and the logical operation based on magnetic domain wall dynamics are proposed [1,2,3,4,5]
We studied the magnetic properties of the Ni nanowires by using a VSM
Ni nanowire arrays were prepared by a constant-current electrodeposition method in a standard two-electrode system

Summary

Introduction

With the rapid development of spintronics, information storage and the logical operation based on magnetic domain wall dynamics are proposed [1,2,3,4,5]. Solution phase synthesis represents one of the most effective and facile routes, in terms of energy consumption and equipment costs, to realize the controllable synthesis of a wide range of nanostructures Among these methods, template-assisted electrodeposition is a popular way to obtain uniform and highly ordered nanowire arrays [12,13]. Combining AAO template with electrodeposition has been studied for decades to synthesize different nanowire arrays; recent years have seen further development in this area, regarding more mechanical understanding in the pore formation [21], fine manipulation of pores, and nanostructure configurations [22], syntheses of novel materials [23], and new applications [24] All of these give new opportunities and development to this routine preparation method for nanomaterials. This work provides a possible route to understand the electrocrystallization behavior in a confined space, and is essential to grow high-quality ferromagnetic nanowire arrays for potential applications in electronic and spintronic devices

Results and Discussion

Typical

Experimental

Conclusions